Some messages are stuck in the Outbox folder or the Drafts folder on a computer that is running Exchange Server 2007 Service Pack 1

Event ID     : 107
Category     : None
Source       : MSExchange Search Indexer
Type         : Warning
Message      : Exchange Search Indexer has temporarily disabled indexing of the Mailbox Database (GUID = xxxx) due to an error (Microsoft.Mapi.MapiExceptionNotFound: MapiExceptionNotFound: Unable to read events. (hr=0x8004010f, ec=-2147221233)
Diagnostic context:
    Lid: 33865  
    Lid: 1494    ---- Remote Context Beg ----
    Lid: 10804   StoreEc: 0xFFFFF9BF
    Lid: 9308    StoreEc: 0x8004010F
    Lid: 2970    StoreEc: 0x8004010F
    Lid: 2986    StoreEc: 0x8004010F
    Lid: 18438  
    Lid: 3798    StoreEc: 0x8004010F
    Lid: 23330   StoreEc: 0x8004010F
    Lid: 12624   StoreEc: 0x8004010F
    Lid: 2031    StoreEc: 0x8004010F
    Lid: 20057   StoreEc: 0x8004010F
    Lid: 1750    ---- Remote Context End ----
    Lid: 28777   StoreEc: 0x8004010F
    Lid: 20098  
    Lid: 20585   StoreEc: 0x8004010F
   at Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, Object objLastErrorInfo)
   at Microsoft.Mapi.MapiEventManager.ReadEvents(Int64 startCounter, Int32 eventCountWanted, Int32 eventCountToCheck, Restriction filter, ReadEventsFlags flags, Int64& endCounter)
   at Microsoft.Mapi.MapiEventManager.ReadEvents(Int64 startCounter, Int32 eventCountWanted)
   at Microsoft.Exchange.Search.RetriableOperations.ReadEvents(ThreadLocalCrawlData unused1, Guid unused2, MapiEventManager eventManager, Int64 watermark, Int32 eventCount)
   at Microsoft.Exchange.Search.RetriableOperations.DoRetriableMapiOperation[SourceType,ReturnType,Parameter1Type,Parameter2Type](ThreadLocalCrawlData crawlData, Guid mailboxGuid, SourceType source, Parameter1Type parameter1, Parameter2Type parameter2, MapiOperationDelegate`4 operationDelegate)
   at Microsoft.Exchange.Search.NotificationWatcher.GetMapiEvents(Int32 maxEvents, NotificationQueue notificationQueue)
   at Microsoft.Exchange.Search.NotificationWatcher.NotificationWatcherThread()).